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AT&T and other U.S cell carriers no longer support the 2G network. This device will no longer work in the USA in most areas. Please purchase a 3G or 4G unit instead.

The GSM-KEY is a wireless gsm remote control switch that connects to the 2G GSM cell phone network.

This device does not come with a SIM card. Please contact your local cell provider and purchase a standard 2G/3G SIM card, and activate it on a pay as you go plan.

This device can be wired to an electronic gate opener or garage door opener. By calling the phone number assigned to the SIM chip (SIM chip not included), the device will activate a relay, which can be connected to the trigger on the gate, or the gate motor itself. The most common use for this device is for gated communities or large garages that allow only authorized phone numbers to call the device to activate the gate or garage door.

The device has two independent relay switches. The first relay switch is activated by calling the SIM cards cell phone number. The device will then reject the call without answering and trigger the first relay. There are no call costs incurred when dialing the unit; it will recognize an authorized telephone number calling it and reject the call without answering. The first relay has two modes, momentary and latching mode. When receiving a phone call in momentary mode, the first relay will turn on for a pre-programmed amount of time. This time period can be programmed by the user and can be anywhere from half a second to many days. When receiving a phone call in latching mode, the device will simply change state. If they relay was on before, it will be turned off. If it was off before, it will be turned on.

Both relays can be controlled by SMS either independently, or at the same time.

Up to 2000 phone numbers can be programmed into the white list of this device.

Specifications:

Program up to 2000 regular phone numbers, 800 special phone numbers, and 5 alarm numbers (these numbers will receive a text message every time the device is activated).